Legion is a group of demons in the Bible who possess a man,, Basically the man they possessed was locked in a tomb and no one could really restrain him,, he was exceptionally powerful in strength. He would tear off iron shackles on his feet and attack people. Anyways, when Jesus arrived, he cleansed the man of the demons and casted the demons into a herd of 2,000 pigs. When he did this, all of the pigs drowned themselves in the lake Exceptionally interesting part of the Bible,, its referenced in Mark 5:1-20 and Luke 8:26-39